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          <h1 class="post-title" itemprop="name headline">java-对文件进行分割和合并</h1>
        

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class="line">212</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.mingrisoft;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.awt.BorderLayout;</span><br><span class="line"><span class="keyword">import</span> java.awt.Dimension;</span><br><span class="line"><span class="keyword">import</span> java.awt.EventQueue;</span><br><span class="line"><span class="keyword">import</span> java.awt.FileDialog;</span><br><span class="line"><span class="keyword">import</span> java.awt.event.ActionEvent;</span><br><span class="line"><span class="keyword">import</span> java.awt.event.ActionListener;</span><br><span class="line"><span class="keyword">import</span> java.awt.event.KeyAdapter;</span><br><span class="line"><span class="keyword">import</span> java.awt.event.KeyEvent;</span><br><span class="line"><span class="keyword">import</span> java.io.File;</span><br><span class="line"><span class="keyword">import</span> java.io.FileInputStream;</span><br><span class="line"><span class="keyword">import</span> java.io.FileNotFoundException;</span><br><span class="line"><span class="keyword">import</span> java.io.FileOutputStream;</span><br><span class="line"><span class="keyword">import</span> java.io.IOException;</span><br><span class="line"><span class="keyword">import</span> javax.swing.JButton;</span><br><span class="line"><span class="keyword">import</span> javax.swing.JFrame;</span><br><span class="line"><span class="keyword">import</span> javax.swing.JLabel;</span><br><span class="line"><span class="keyword">import</span> javax.swing.JPanel;</span><br><span class="line"><span class="keyword">import</span> javax.swing.JScrollPane;</span><br><span class="line"><span class="keyword">import</span> javax.swing.JTabbedPane;</span><br><span class="line"><span class="keyword">import</span> javax.swing.JTextArea;</span><br><span class="line"><span class="keyword">import</span> javax.swing.JTextField;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span>  <span class="title">Fenge</span> <span class="keyword">extends</span> <span class="title">JFrame</span></span>&#123;</span><br><span class="line">	<span class="comment">/**</span></span><br><span class="line"><span class="comment">	 * </span></span><br><span class="line"><span class="comment">	 */</span></span><br><span class="line">	<span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> <span class="keyword">long</span> serialVersionUID = <span class="number">5289423046955069116L</span>;</span><br><span class="line">    <span class="keyword">private</span> JTextField filePathText;</span><br><span class="line">    <span class="keyword">private</span> JTextField fileSizeText;</span><br><span class="line">    <span class="keyword">private</span> JTextArea fileList;</span><br><span class="line">	Fenge()&#123;</span><br><span class="line">		setBounds(<span class="number">400</span>,<span class="number">400</span>,<span class="number">270</span>,<span class="number">500</span>);</span><br><span class="line">		setTitle(<span class="string">"文件分割合成"</span>);</span><br><span class="line">		<span class="comment">//</span></span><br><span class="line">		JPanel pane1 = <span class="keyword">new</span> JPanel();</span><br><span class="line">		</span><br><span class="line">		<span class="comment">//pane1</span></span><br><span class="line">		JLabel chooselb = <span class="keyword">new</span> JLabel(<span class="string">"源文件"</span>);</span><br><span class="line">		 filePathText = <span class="keyword">new</span> JTextField(<span class="number">10</span>);</span><br><span class="line">        JButton choose = <span class="keyword">new</span> JButton(<span class="string">"选择"</span>);		</span><br><span class="line">        JLabel setSizelb = <span class="keyword">new</span> JLabel(<span class="string">"大小/M"</span>);</span><br><span class="line">        fileSizeText = <span class="keyword">new</span> JTextField(<span class="number">10</span>);</span><br><span class="line">	    JButton fengeConfirm = <span class="keyword">new</span> JButton(<span class="string">"分割"</span>);</span><br><span class="line">	   JTabbedPane  tabbedPane = <span class="keyword">new</span> JTabbedPane();</span><br><span class="line"></span><br><span class="line">	   pane1.add(chooselb);</span><br><span class="line">	   pane1.add(filePathText);</span><br><span class="line">	   pane1.add(choose);</span><br><span class="line">	   pane1.add(setSizelb);</span><br><span class="line">	   pane1.add(fileSizeText);</span><br><span class="line">	   pane1.add(fengeConfirm);</span><br><span class="line">  </span><br><span class="line">	   <span class="comment">//pane2</span></span><br><span class="line">	   </span><br><span class="line">	   JPanel pane2 = <span class="keyword">new</span> JPanel();</span><br><span class="line">		JPanel pane21 = <span class="keyword">new</span> JPanel();</span><br><span class="line">		JScrollPane scrollPane = <span class="keyword">new</span> JScrollPane();</span><br><span class="line">		JPanel pane23 = <span class="keyword">new</span> JPanel();</span><br><span class="line">		</span><br><span class="line">		scrollPane.setPreferredSize(<span class="keyword">new</span> Dimension(<span class="number">250</span>,<span class="number">200</span>));</span><br><span class="line">		</span><br><span class="line">		JLabel combinelb = <span class="keyword">new</span> JLabel(<span class="string">"选择合并文件"</span>);</span><br><span class="line">		fileList = <span class="keyword">new</span> JTextArea();</span><br><span class="line">		JButton openFiles = <span class="keyword">new</span> JButton(<span class="string">"打开"</span>);</span><br><span class="line">		JButton hebingConfirm = <span class="keyword">new</span> JButton(<span class="string">"合并"</span>);</span><br><span class="line">	   pane21.add(combinelb);</span><br><span class="line">	   scrollPane.setViewportView(fileList);</span><br><span class="line">	   pane23.add(openFiles);</span><br><span class="line">	   pane23.add(hebingConfirm);</span><br><span class="line">	   	   </span><br><span class="line">	   pane2.add(pane21,BorderLayout.NORTH);</span><br><span class="line">	   pane2.add(scrollPane,BorderLayout.CENTER);</span><br><span class="line">	   pane2.add(pane23,BorderLayout.SOUTH);</span><br><span class="line">  </span><br><span class="line">	   </span><br><span class="line">	   <span class="comment">//1+2</span></span><br><span class="line">	   tabbedPane.add(<span class="string">"分割"</span>,pane1);</span><br><span class="line">	   tabbedPane.add(<span class="string">"合成"</span>,pane2);</span><br><span class="line">	   setContentPane(tabbedPane);</span><br><span class="line">	</span><br><span class="line">	<span class="comment">/*</span></span><br><span class="line"><span class="comment">	 * 监听</span></span><br><span class="line"><span class="comment">	 */</span></span><br><span class="line">	   </span><br><span class="line">	   <span class="comment">//选择分割文件</span></span><br><span class="line">	   choose.addActionListener(<span class="keyword">new</span> ActionListener()&#123;</span><br><span class="line"></span><br><span class="line">		<span class="meta">@Override</span></span><br><span class="line">		<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">actionPerformed</span><span class="params">(ActionEvent e)</span> </span>&#123;</span><br><span class="line">			<span class="comment">// TODO 自动生成的方法存根</span></span><br><span class="line">			du_choose_action(e);</span><br><span class="line">		&#125;</span><br><span class="line">		   </span><br><span class="line">	   &#125;);</span><br><span class="line">	   </span><br><span class="line">	   <span class="comment">//限制输入大小合法</span></span><br><span class="line">	   fileSizeText.addKeyListener(<span class="keyword">new</span> KeyAdapter() &#123;</span><br><span class="line">           <span class="meta">@Override</span></span><br><span class="line">           <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">keyTyped</span><span class="params">(KeyEvent event)</span> </span>&#123; <span class="comment">// 某键按下时调用的方法</span></span><br><span class="line">               <span class="keyword">char</span> ch = event.getKeyChar(); <span class="comment">// 获取用户键入的字符</span></span><br><span class="line">               <span class="keyword">if</span> ((ch &lt; <span class="string">'0'</span> || ch &gt; <span class="string">'9'</span>)) &#123; <span class="comment">// 如果用户输入的信息不为数字或小数</span></span><br><span class="line">                   event.consume(); <span class="comment">// 不允许用户键入</span></span><br><span class="line">               &#125;</span><br><span class="line"></span><br><span class="line">           &#125;</span><br><span class="line">       &#125;);</span><br><span class="line">	   </span><br><span class="line">	   </span><br><span class="line">	   <span class="comment">//提交分割</span></span><br><span class="line">	   fengeConfirm.addActionListener(<span class="keyword">new</span> ActionListener() &#123;</span><br><span class="line"></span><br><span class="line">		<span class="meta">@Override</span></span><br><span class="line">		<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">actionPerformed</span><span class="params">(ActionEvent e)</span> </span>&#123;</span><br><span class="line">			<span class="comment">// TODO 自动生成的方法存根</span></span><br><span class="line">			do_fengeCofirm(e);</span><br><span class="line">		&#125;</span><br><span class="line">		   </span><br><span class="line">	   &#125;);</span><br><span class="line">		</span><br><span class="line">		</span><br><span class="line">	&#125;<span class="comment">//构造体结束</span></span><br><span class="line">	</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">	<span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span></span>&#123;</span><br><span class="line">		EventQueue.invokeLater(<span class="keyword">new</span> Runnable()&#123;</span><br><span class="line"></span><br><span class="line">			<span class="meta">@Override</span></span><br><span class="line">			<span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">run</span><span class="params">()</span> </span>&#123;</span><br><span class="line">				<span class="comment">// TODO 自动生成的方法存根</span></span><br><span class="line">				Fenge f = <span class="keyword">new</span> Fenge();</span><br><span class="line">				 f.setVisible(<span class="keyword">true</span>);</span><br><span class="line">			&#125;</span><br><span class="line">			</span><br><span class="line">		&#125;);</span><br><span class="line">		 </span><br><span class="line">	&#125;</span><br><span class="line">	</span><br><span class="line">	<span class="function"><span class="keyword">protected</span> <span class="keyword">void</span> <span class="title">du_choose_action</span><span class="params">(ActionEvent e)</span> </span>&#123;</span><br><span class="line">		<span class="comment">// TODO 自动生成的方法存根</span></span><br><span class="line">		FileDialog FD = <span class="keyword">new</span> FileDialog(<span class="keyword">this</span>);</span><br><span class="line">		FD.setVisible(<span class="keyword">true</span>);</span><br><span class="line">		String path =FD.getDirectory()+FD.getFile();</span><br><span class="line">		<span class="keyword">if</span>(FD.getFile()!=<span class="keyword">null</span> )&#123;</span><br><span class="line">			filePathText.setText(path);</span><br><span class="line">		&#125;</span><br><span class="line">&#125;</span><br><span class="line">	</span><br><span class="line">	<span class="function"><span class="keyword">protected</span> <span class="keyword">void</span> <span class="title">do_fengeCofirm</span><span class="params">(ActionEvent e)</span> </span>&#123;</span><br><span class="line">		<span class="comment">// TODO 自动生成的方法存根</span></span><br><span class="line">		FileInputStream fis = <span class="keyword">null</span>;</span><br><span class="line">		File originFile = <span class="keyword">new</span> File(filePathText.getText());</span><br><span class="line">		<span class="keyword">int</span> size =<span class="number">1024</span>*<span class="number">1024</span> ;</span><br><span class="line">		size = size* (Integer.parseInt(fileSizeText.getText())) ;</span><br><span class="line">		<span class="comment">//System.out.println("大小"+fileSizeText.getText());</span></span><br><span class="line">		<span class="keyword">int</span> length = (<span class="keyword">int</span>) originFile.length();</span><br><span class="line">		<span class="keyword">int</span> num = length/size;<span class="comment">//向下取整,需要检测余数</span></span><br><span class="line">		<span class="keyword">int</span> yu = length%size;<span class="comment">//注意到余数</span></span><br><span class="line">		<span class="comment">//获取扩展名包括start 不包括end</span></span><br><span class="line">		String strSuffix =originFile.getAbsolutePath().substring(originFile.getAbsolutePath().lastIndexOf(<span class="string">"."</span>),originFile.getAbsolutePath().length()) ;</span><br><span class="line">		<span class="comment">//获取路径</span></span><br><span class="line">		String strPrefix = originFile.getAbsolutePath().substring(<span class="number">0</span>,originFile.getAbsolutePath() .lastIndexOf(<span class="string">"\\"</span>)) ;</span><br><span class="line">	<span class="comment">//	System.out.println("路径"+strPrefix);</span></span><br><span class="line">	<span class="comment">//	System.out.println("扩展名"+strSuffix);</span></span><br><span class="line">		String strName =originFile.getAbsolutePath().substring(  (originFile.getAbsolutePath() .lastIndexOf(<span class="string">"\\"</span>)+<span class="number">1</span>) , originFile.getAbsolutePath().lastIndexOf(<span class="string">"."</span>) ) ; ;</span><br><span class="line">		System.out.println(<span class="string">"文件名 "</span>+strName);</span><br><span class="line">		<span class="keyword">try</span> &#123;</span><br><span class="line">			fis=<span class="keyword">new</span> FileInputStream(originFile);</span><br><span class="line">			File[] fl =<span class="keyword">new</span> File[num+<span class="number">1</span>];</span><br><span class="line">			<span class="keyword">int</span> begin = <span class="number">0</span>;</span><br><span class="line">			<span class="keyword">for</span>(<span class="keyword">int</span> i = <span class="number">0</span>; i&lt;num ; i++)&#123;</span><br><span class="line">				fl[i] = <span class="keyword">new</span> File(strPrefix+<span class="string">"\\"</span>+strName+strSuffix+<span class="string">"."</span>+(i+<span class="number">1</span>)+<span class="string">".temp"</span>);<span class="comment">//创建保存文件</span></span><br><span class="line">				<span class="keyword">if</span>( !fl[i].isFile() )&#123;</span><br><span class="line">					fl[i].createNewFile();</span><br><span class="line">				&#125;</span><br><span class="line">				FileOutputStream fos= <span class="keyword">new</span> FileOutputStream(fl[i]);<span class="comment">//对每个保存文件建立输出流</span></span><br><span class="line">				<span class="keyword">byte</span>[] bl = <span class="keyword">new</span> <span class="keyword">byte</span>[size];</span><br><span class="line">				fis.read(bl);</span><br><span class="line">				fos.write(bl);</span><br><span class="line">				begin =begin+size*<span class="number">1024</span>*<span class="number">1024</span> ;<span class="comment">//移动起点</span></span><br><span class="line">				fos.close();</span><br><span class="line">			&#125;<span class="comment">//循环结束</span></span><br><span class="line">			<span class="keyword">if</span>(yu!=<span class="number">0</span>)&#123;</span><br><span class="line">				fl[num]=<span class="keyword">new</span> File(strPrefix+<span class="string">"\\"</span>+strName+strSuffix+<span class="string">"."</span>+num+<span class="string">".temp"</span>);</span><br><span class="line">				<span class="keyword">if</span>( !fl[num].isFile() )&#123;</span><br><span class="line">					fl[num].createNewFile();</span><br><span class="line">				&#125;</span><br><span class="line">				FileOutputStream foyu= <span class="keyword">new</span> FileOutputStream(fl[num]);<span class="comment">//保存文件建立输出流</span></span><br><span class="line">				<span class="keyword">byte</span>[] byu = <span class="keyword">new</span> <span class="keyword">byte</span>[yu];<span class="comment">//注意大小设置为余数</span></span><br><span class="line">				fis.read(byu);</span><br><span class="line">				foyu.write(byu);</span><br><span class="line">				</span><br><span class="line">				foyu.close();</span><br><span class="line">			</span><br><span class="line">			&#125;</span><br><span class="line">		&#125; <span class="keyword">catch</span> (FileNotFoundException e1) &#123;</span><br><span class="line">			<span class="comment">// TODO 自动生成的 catch 块</span></span><br><span class="line">			e1.printStackTrace();</span><br><span class="line">		&#125; <span class="keyword">catch</span> (IOException e1) &#123;</span><br><span class="line">			<span class="comment">// TODO 自动生成的 catch 块</span></span><br><span class="line">			e1.printStackTrace();</span><br><span class="line">		&#125;</span><br><span class="line">		</span><br><span class="line">		</span><br><span class="line">		</span><br><span class="line">	<span class="comment">//	System.out.print(originFile.getAbsolutePath() );</span></span><br><span class="line">	<span class="comment">//	System.out.print(originFile.toURI() );</span></span><br><span class="line">		<span class="comment">//String savePath = filePathText.getText().substring(0,filePathText.getText().lastIndexOf(arg0));</span></span><br><span class="line">	&#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

      
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